John mccormick



No. 6|2,749. Patented Oct. I8, |898.

' J. MCCORMICK.

GAGE.

(Application led. Dec. 16, 1897.) (No Model.)

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.IOI'IN MCCORMICK, OF VVILMERDING, PENNSYLVANIA.

GAGE.

SPECIFICATION forming part of Letters Patent N0. 612,749,`dated October 18, 1898. Application led December 16,1897. Serial No. 662,118. (No model.)

and parts and combinations of the same, as

will be fully described hereinafter and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

Figure lis a front elevation of the improvement with parts in section, and Fig. 2 is a plan view of the same with parts in section.

The improved gage isprovided with the connections A and B, leading to the steam and water compartments of the boiler on which the device is used, the connection A termi-- nating at its outer end in a valve-casing C, and a similar valve-casing D is arranged on the outer end of the connection l5. The valvecasings (l and D are provided with oppositelyarranged outlets C C2 and D D2, respectively, of which the outlets C and D connect with a glass E and the outlets C2 and D2 connect with a second glass F.

In the valve-casings C and D are fitted to slide the double valves G G', respectively,`

adapted to be seated on valve-seats C3 and D3 in the outlets C and D and on valve-seats CIl and D4 on the outlets G2 and D2, respectively, it being understood that when the valves are seated on the seats in one outlet the other seats are uncovered, as-will be readily undern stood by reference to Fig. I.

On the outlets Dland D2` are arranged faucets I-I I'I, respectively, adapted to be opened for receiving the valves automatically to establish communication between the watercompartments of the boiler and the glass E or F. For instance, when it is desired to use the glass Efor gaging purposes then the operator opens for an instant the faucet Il', whereupon the water from the connections A and B escapes through the faucet H' and in so doing acts on the valves G and G in such a manner that the valves G and G' are shifted to the left upon the seats G4 and D4 to close the outlets C2 and D2, respectively, and to cstablish communication between the connections A and` B with the outlets G and D'l and the gage-glass E. Now when the latter breaks then the outrushing steam and water shift the valves G andG to the right upon the seats CS and D3 to close the outlets C and D vto prevent the escape of steam andwater at the broken glass E. The shifting of the valves G and Gito the right uncovers the seats C4 and D4, so that communication is established between the connections A and B and the glass F, which now indicates the level of the water in the boiler. The broken glass E is removed and replaced` by a new one, and in case the glass F should break the outrushing steam and water will shift the valves G and G to the left to prevent the escape of steam and water and to establish communication between the boiler and the glass E. Thus it is evident that whenever a glass breaks the steam and water are immediately shut off from this broken glass and at the same time the other gage-glass is brought into action for indicating the level of the water in the boiler.

The device is very simple and durable in construction and is `not liable to get out of order, suitable provision being made for conveniently replacing broken glasses.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. A gage, having two gage-tubes and tubular connection between the tubes, the tubular connection havinga supply-orifice therein and having a valve-seat on each side of the supply-orifice, and a duplex valve movable to seat against either one of the two valve-seats and automatically shifted by thepressure of iiuid thereon.

2. In a gage, the combination of two gage tubes, a cock commanding the outlet-oriiice IOO of each tube, a tubular connection between the tubes, the tubular connection having an intermediately-located inlet-orifice and having a Valve-seat on each side of said orifice, and a duplex Valve located in said tubular connection and between the Valve-seats, and

shifted automatically by the action of uid i to bear against eithel` one of the two valveseats.

JOHN MCCORMICK. 

